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US 2018/0123525 A1Published application
Differential amplifier
AssigneeHewlett Packard Enterprise Development LP
InventorDacheng Zhou
Life of this patent
Estimating the term…
Abstract
A differential amplifier includes a pair of cascode amplifiers. A voltage clamp is coupled to the pair of cascode amplifiers.
Claims20
A differential amplifier, comprising:
- a first differential signal input connected to a first cascode amplifier, the first cascode amplifier comprising a first pair of transistors;
- a second differential signal input connected to a second cascode amplifier, the second cascode amplifier comprising a second pair of transistors;
- and
- a clamp voltage source connected to a gate of a first clamp transistor interposed between the first pair of transistors and connected to a gate of a second clamp transistor interposed between the second pair of transistors.
1 more element
A device, comprising:
- a first differential signal input connected to a first cascode amplifier;
- a second differential signal input connected to a second cascode amplifier;
- a signal output connected to the first and second cascode amplifiers;
- a voltage swing clamp circuit connected to the first and second cascode amplifiers;
- a voltage supply (VDDQ) connected to the first and second cascode amplifiers;
- and
- a tail current control circuit connected between the voltage supply and the first and second cascode amplifiers.
4 more elements
A method, comprising:
- applying a clamping voltage to a gate of a first clamp transistor and a gate of a second clamp transistor,
- the first clamp transistor connected to a source of a first transistor of a first cascode amplifier and connected to a drain of a second transistor of the first cascode amplifier, and
- the second clamp transistor connected to a source of a first transistor of a second cascode amplifier and connected to a drain of a second transistor of the second cascode amplifier;
- and
- applying a bias voltage to a gate of a bias transistor, the bias transistor having a source connected to a voltage supply and a drain connected to the source of the second transistor of the first cascode amplifier and the second transistor of the second cascode amplifier.
2 more elements
Dependencies are inferred from the claim text.